Summary

In this chapter, we introduced some different API styles, including REST-based APIs, gRPC APIs, and GraphQL APIs, and explored how to design them. We also introduced a couple of different ways to implement real-time communication, including WebSocket, gRPC streaming, and SignalR. So far, we have not touched on much code, but we have reviewed the basic concepts of web APIs.

In the next chapter, we will start to learn how to use ASP.NET Core to implement them.